How severe is CVE-1999-0593?

CVE-1999-0593 has a CVSS 2.0 base score of 4.9, rated medium severity.

Is CVE-1999-0593 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0593?

CVE-1999-0593 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0593?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0593 published?

CVE-1999-0593 was published on 1999-01-01 and last updated on 2026-06-16.

CVE-1999-0593

CVE-1999-0593 is a medium-severity vulnerability in Microsoft Windows Nt with a CVSS 2.0 base score of 4.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 4.9)
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows Nt
Published: 1999-01-01
Last modified: 2026-06-16

Description

The default setting for the Winlogon key entry ShutdownWithoutLogon in Windows NT allows users with physical access to shut down a Windows NT system without logging in.

Frequently asked questions

What is CVE-1999-0593?: The default setting for the Winlogon key entry ShutdownWithoutLogon in Windows NT allows users with physical access to shut down a Windows NT system without logging in.
How severe is CVE-1999-0593?: CVE-1999-0593 has a CVSS 2.0 base score of 4.9, rated medium severity.
Is CVE-1999-0593 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0593?: CVE-1999-0593 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0593?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0593 published?: CVE-1999-0593 was published on 1999-01-01 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*

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